Final answer:
In philosophy, logicians such as Gilbert Harman have argued that the Liar statement is neither true nor false due to its lack of appropriate connection to evidence.
Step-by-step explanation:
In philosophy, there have been logicians who argued that the Liar statement is logical and can either be true or false. One such philosopher is Gilbert Harman, who suggested adding a condition to the traditional Justified True Belief (JTB) account of knowledge. Harman's condition is that a person's belief cannot be based on an inference that uses false premises, which includes the Liar statement. According to Harman, the Liar statement does not fall into the categories of true or false since it cannot be appropriately connected to the evidence used to deduce the belief. Therefore, logicians like Harman consider the Liar statement to be neither true nor false.